baber/WOPTO huggingface dataset:
Patent GB-1423613-A (GB)
Title: Composite articles based on heat-resistant resins
IPC: C08J5/24
Filed: 1973-09-11
Abstract: 1423613 Laminating polyimides RHONEPOULENC SA 11 Sept 1973 [11 Sept 1972] 42731/73 Heading B5N Composite articles are made by pressing a stack of at least one layer (a) of a bis-imide/ polyamine prepolymer (as defined) and at least one layer (b) of a solid material, any two layers (b) being separated by at least one layer (a), and a polyamide-imide (as defined) solution having been coated on to at least one of any pair of surfaces (a) and (b) to be joined, the solution being of polyamide-imide concentration not greater than 70% at the time of stacking. The prepolymer is of softening point 50-220 C. and is prepared by reacting an imide (D being a divalent radical containing a C=C bond and A being a C 2 -C 30  divalent radical) with a polyamine R(NH 2 ) x  (x being at least 2) in a ratio of 0À55-25 mols. bis-imide per molar NH 2  group; in examples a reaction product of 4,4<SP>1</SP> - bis - (maleimido) - diphenylmethane and 4,4<SP>1</SP>-diphenylmethane is used. Layer (a) may comprise a prepolymer moulding, optionally filled, or a non-woven or woven fabric impregnated with the prepolymer, a number of suitable mineral fibres being specified. Layer (b) may comprise a plate, foil, foam or honeycomb, suitable materials being listed, and may be of the same material as layer (a). The polyamide-imide comprises units (Q being a divalent radical containing at least one benzene ring and Z being a trivalent aromatic radical) and may be applied as a 0À5- 30 wt. per cent solution in amounts up to 50 g. dry resin/m.<SP>2</SP> and allowed to evaporate to the desired concentration. In examples a trimellitic anhydride/bis - (4 - isocyanatophenyl)methane reaction product is used. The composite is made by pressing at 1À5-400 bars (absolute pressure) and up to 350 C., e.g. 100-280 C. for 30 minutes-3 hours to cure the prepolymer, and optionally post-stoving at up to 300 C. for up to 48 hours. The products are used as insulators, printed circuits, panels and compressor vanes. In examples, (i) a copper foil is pressed on to a stack of 12 prepolymer-impregnated glass fibre fabrics which has been coated with polyamide-imide, and (ii) a prepolymer-impregnated, polyamide-imide coated glass fabric is pressed on to each face of a glass fibre/phenolic resin honeycomb.
Patent GB-1128865-A (GB)
Title: Automatic sound volume control arrangement
IPC: H03G3/30
Filed: 1966-09-26
Abstract: 1,128,865. Volume control. AKAI ELECTRIC CO. Ltd. Sept.26, 1966 [May 12, 1966], No.42759/66. Heading G1A [Also in Division H4] In an automatic volume control system, see Heading H4R, for a tape recorder, signal inputs exceeding a predetermined value drive a motor on whose shaft is a disc mask with a tapered slot arranged between a light source and a photoresistor which is connected as one element in a potentiometer on the input of the amplifier. In an alternative embodiment a number of neons are fired in turn by an increasing input signal. The neons are biased so that once struck they remain lit until the supply is interrupted and they are arranged to illuminate the photo-resistor in the amplifier input potentiometer.
Patent GB-1481193-A (GB)
Title: Fluoroelastomers
IPC: C08L27/00
Filed: 1974-10-02
Abstract: 1481193 Fluoroelastomers EI DU PONT DE NEMOURS & CO 2 Oct 1974 [3 Oct 1973] 42803/74 Heading C3P Vulcanizable fluoroelastomer compositions comprise: (a) an elastomeric copolymer of vinylidene fluoride and at least one other fluorine-containing vinylidene monomer; (b) a vulcanizing agent which is either a 1,4-benzoquinone of formula wherein R 1 , R 2 , R 3  and R 4  are each H, alkyl, aryl, aralkyl or alkaryl, at least two of them being H, or a 1,4-naphthoquinone of formula wherein R 6 , R 7  and R 8  are each H, alkyl or aralkyl; (c) a vulcanization accelerator which is a quaternary ammonium, phosphonium stibonium or arsonium compound; and (d) a divalent metal oxide or hydroxide. Other conventional compounding ingredients may be included, e.g. carbon black. In specific examples, components (a) to (d) are as follows: (a) vinylidene fluoride/hexafluoropropylene copolymer; (b) 1,4-benzoquinone, methyl-1,4- benzoquinone, 2,5-dimethyl-1,4-benzoquinone, 1,4-naphthoquinone or 2-methyl-1,4-naphthoquinone; (c) benzyl triphenyl phosphonium chloride, tetraphenyl phosphonium chloride or methyl trioctyl ammonium chloride; and (d) both calcium hydroxide and magnesium oxide.
Patent GB-1017629-A (GB)
Title: Improvements in or relating to the packaging of surgical goods
Inventor: BLYDE JOHN
IPC: B65D75/38
Filed: 1963-11-01
Abstract: 1,017,629. Packaging surgical material. ETHICON Ltd. Nov. 2, 1964 [Nov. 1, 1963], No. 43229/63. Heading B8C. A sheet of material 7 on which has been placed a surgical material, e.g. a stick of bone wax 9, is inserted in a sleeve 6 and the whole enclosed in outer sealed envelope 3. The sleeve 6 and sheet of material 7 which are preferably made from paper, fibreboard, cardboard, aluminium foil or plastics sheet material may be coated with silicone to facilitate the removal of the wax stick 9. The outer envelope comprises a bottom sheet 4 of a paper and aluminium foil laminate bonded with polythene heat sealed to a top sheet 3 which is preferably a transparent film, ears 3a, 4a being left unsealed to facilitate opening the envelope. A folded cover of glassine or other wax-resistant material may be placed around the wax 9 before it is enclosed in the sheet 7.
Patent GB-1444767-A (GB)
Title: Electrical connector
IPC: H01R4/50
Filed: 1973-09-14
Abstract: 1444767 Electrical connector ITT INDUSTRIES Inc 14 Sept 1973 [2 Oct 1972] 43280/73 Heading H2E To connect releasably a cable-terminating lug to a power-off supply terminal in a heavy current circuit with minimum effort, cup-like receptacle 40 mounted on terminal 16 and likesized hole in lug 30 are coupled by sleeve 52 with axially slotted expansible ends 70, 71 opened out by the axial approach of conical nuts 82 on opposed threads of a screw 84 within the sleeve. The nuts carry projecting axial ribs engaging the axial slots 54 in the sleeve, while their conical body profiles match the conical bores, tapering towards the centre of the sleeve. The screw 84 is cross-dowelled 130 to a coupling 150 into which an eyebolt 182 may be bayonet fitted. Eyebolt 182 may be rotated or moved axially by a suitable rod-like tool. To connect terminal 16 to lug 30, sleeve 52 with nuts and screw is inserted through the hole in lug 30, into cup 40, the periphery of the mid-section of the sleeve being gripped frictionally by the surrounding housing 24. Rotation of the screw then expands and clamps the sleeve. Clearance between cup 40 and lug 30 is sufficient to withstand circuit voltage when the sleeve is removed, and optionally replaced by an insulating isolating plug. While screw rotation is not required, the conical cavity round coupling 150 may be filled by an insulating plug, optionally containing a voltage test probe of known design, screwed to thread 170 of coupling 150. In an alternative embodiment (Fig. 13, not shown) two lugs on separate cables may be connected by a similar sleeve, the end of the housing corresponding to terminal 16 being fitted with a suitable plug. The housing may comprise two housings of the first embodiment joined face-to-face by their empty supply terminal ends. The cross-section of one or both sleeve ends, and of the corresponding hole, may be non- circular, advantageous in preventing rotation and thus obviating the need for frictional grip on the mid-section of the sleeve.
Patent GB-992891-A (GB)
IPC: D06P1/12
Filed: 1963-11-04
Abstract: The invention provides a process in which stabilized azo dye mixtures are applied to the material with an assistant NN-diethyl-N-hydroxyethyl amine salt of lactic acid.  The dyeing is developed by a dry heat process.  The stabilized azo dye mixtures contain a diazoamino compound which splits up during the development to yield the diazo compound to couple with the coupling agent, the diazoamino compound may be any of those which are normally developed by neutral or acidic development processes.  The dry heating process is effected at 120-200 DEG C. the assistant preferably used as 0.5-5% by weight of the printing paste may be added at any stage before development, the paste used generally has an alkaline pH. Specifications 729,156, 729,157, 729,158, 762,269, 766,609, 766,730, 771,812, 778,928, 785,613, 788,689, 795,339, 808,262, 811,221, 811,232, 821,926, 829,570 and 843,241 are referred to.
Patent GB-903261-A (GB)
Title: Improvements relating to the production of castings of polycaprolactam or a similar polyamide
IPC: B29C39/38
Filed: 1959-12-22
Abstract: Polycaprolactam or a similar polyamide is made by the polymerization of a mixture containing the monomer, together with polymerization catalysts and preferably an inert filler, at such a predetermined initial temperature above the m.p. of the monomer in the reaction mixture that the temperature of the mixture in the p  last stage of the polymerization does not exceed the melting or softening point of the final polymer.  An alkali metal (e.g. sodium) salt of 6-caprolactam and a compound selected from the N-alkylimide series are added to the monomer as polymerization catalysts.  Examples of the compound include: acetylcaprolactam, caproylcaprolactam, diacetyl-ethylamine, dicaproylbutylamine, dicaproylethylamine, diacetylbutylamine, tetraacetylhexamethylenediamine, and styrenemethacryloylcaprolactam copolymer.  The inert filler may be powdered metal, metal oxide, pigment, graphite, abrasive, glass fibre or metal fibre.  In the examples quoted, the following reactants were used: sodium salt of 6-caprolactam, N-acetyl-6-caprolactam and anhydrous 6-caprolactam; sodium salt of 6-caprolactam, tetraacetylhexamethylenediamine and 6-caprolactam; and sodium salt of 6-caprolactam, N-acetyl-6-caprolactam, 6-caprolactam, and powdered carborundum abrasive.ALSO:Castings of polycaprolactam or similar polyamide are made by the polymerisation of a mixture containing the monomer, together with polymerisation catalysts and preferably an inert filler, at such a predetermined initial temperature above the melting point of the monomer in the reaction mixture that the temperature of the mixture in the last stage of the polymerisation does not exceed the melting or softening point of the final polymer, the polymerisation being conducted in a mould in such manner that it occurs in a substantially heat insulated reaction space.  The polymerisation of 6-caprolactam results in the evolution of such amount of heat that the temperature of the polymerising material rises by about 50 DEG  to 60 DEG C. if the reaction conditions are adiabatic and hence the initial temperature of the polymerising mixture should be that much lower than the softening point of the polymer, i.e. 150 DEG  to 160 DEG C.  The lower limit of this temperature range is determined by the limited solubility of the polyamide in monomeric 6-caprolactam at temperatures below 150 DEG C. Powdered metals, metal oxides, pigments, graphite, abrasives, glass fibres and metallic fibres may be used as the inert filler.  Where fillers are used, they absorb a certain amount of the reaction heat so that the temperature range under adiabatic conditions is less than 60 DEG C.  A heated aluminium mould may be used, thermocouple units being provided both in the heating jacket and inside the reaction space so that the heating of the jacket can be regulated to keep the temperatures of both the jacket and the polymerising reaction mixture equal.
Patent GB-1489222-A (GB)
Title: Method of delignification of cellulosic material in alkaline medium using oxygen
IPC: D21C9/00
Filed: 1974-10-08
Abstract: 1489222 Delignifying cellulosic materials TOYO PULP CO Ltd 8 Oct 1974 [18 Feb 1974] 43506/74 Headings DIP and D2W A method of delignifying cellulosic material e.g. unbleached chemical pulp, semi chemical grade pulp or wood chips comprises treating the agglomerated material in a pressurised reaction vessel at an elevated temperature with an alkaline aqueous medium in which oxygen has previously been dissolved, a part of the waste liquor formed during the delignification being continuously discharged from the vessel, and being continually replaced with fresh oxygenated medium. The agglomeration of the material is brought about by selecting the concentration to be within the range in which an agglomeration is formed, which retains its structure as if it were a mat, layer or bed without any gaseous space in it. The material may be introduced into the vessel continuously or discontinuously. Waste liquor may be separately discharged from different stages of the lignification in the vessel, replacement with fresh medium also being effected at different stages of delignification, e.g. using higher pH's at earlier stages and different alkalines at lower pH's at later stages of delignification. The alkaline medium may be recovered from the discharged waste liquor, or the discharge from a later stage may be recirculated as the fresh input to an earlier stage, in countercurrent to a flow of the cellulosic material through the vessel. The preferred cellulosic material concentrations are 5-15% by weight for chemical and semi chemical grade pulp and from 10-20% by weight for wood chips; the preferred operating temperature is 80- 160C and the preferred oxygen partial pressure 4-12 kg/cm<SP>2</SP>.
Patent GB-1272328-A (GB)
Title: Improved silver halide emulsions which contain colour couplers
Inventor: HUECKSTAEDT HARALD
IPC: G03C1/043
Filed: 1969-09-03
Abstract: 1,272,328. Bis - (thiomorpholinyl) - ethane- (1,2). AGFA-GEVAERT A.G. 3 Sept., 1969 [6 Sept., 1968], No. 43513/69. Heading C2C. [Also in Divisions C3 and G2] Bis - (thiomorpholinyl) - ethane - (1,2) is prepared by adding ethylene bromide to an aqueous solution of thiomorpholine and sodium hydroxide and refluxing.
Patent GB-1006908-A (GB)
Title: Improvements relating to the testing of water for flouride
IPC: G01N31/22
Filed: 1962-11-17
Abstract: The fluoride content of a sample of water is estimated by colorimetric techniques after the addition to the sample of a mixture, in solid form, comprising a metal salt and a dye reacting therewith to form a fluoride sensitive lake.  The salt may be zirconium oxychloride, thorium nitrate, aluminium ammonium sulphate or a compound of ferric iron, cerium or lanthanum.  The dye may be alizarin red S, aluminon, eriochrome cyanine R, xylenol orange, haematoxylin, ammonium aurine tricarboxylate, purpurin sulphonate, solochrome violet RS, 1-(o-arsenophenylazo)-2-naphthol-3:6-disulphonic acid or 4,5-dihydroxy-3-(parasulphophenylazo)-2,7-naphthalene-disulphonic acid trisodium salt.  The mixture may also contain a compound, such as sodium bisulphate, sulphamic acid or potassium hydrogen phthalate, which serves to swamp and hence blanket the effect of any natural sulphate in the sample, and an additional acidifying agent.  The mixture is used in tablet or capsule form and may contain fillers, lubricants and disintegrants.  A predetermined proportion of mixture in the sample water achieves a colour which is examined by a spectrophotometer or compared visually with standards.  Standards may be coloured glasses or solutions, prepared by adding identical quantities of mixture to distilled water or to samples of water taken before fluoridation, together with standard quantities of soluble sodium fluoride or ammonium fluoride, preferably used in tablet form. Reference has been directed by the Comptroller to Specification 902,884.
Patent GB-1043097-A (GB)
Title: Decobalting process for hydroformylation product
IPC: C07C45/50
Filed: 1964-10-27
Abstract: A hydroformylation product containing an aldehyde, an alcohol and cobalt is decobalted by contacting the mixture with an aqueous solution of a C1-C5 straight-chain alcohol having at least one carbon atom less than the product alcohol, the amount of alcohol in the aqueous solution being approximately the stoichiometric amount sufficient to react with and form a complex with the dicobalt octacarbonyl in the hydroformylation reaction mixture.  The preferred C1-C5 alcohol is methanol. If the temperature of the solution is maintained below 24 DEG  C. and the pressure in the range 1-280 kg./sq. cm., the resulting complex will remain in the aqueous layer and additional alcohol is introduced to maintain the required concentration.  If however the temperature is maintained above 24 DEG C. and the pressure is in the range 1-10 kg./sq. cm. the complex will be decomposed to form cobalt ions soluble in the aqueous medium, carbon monoxide which will leave the reaction zone and alcohol which is reused to form more complex.
Patent GB-1513739-A (GB)
Title: Screening apparatus for sewage
IPC: B01D25/38
Filed: 1975-09-29
Abstract: 1513739 Screen rake NORTH WEST WATER AUTHORITY 29 Sept 1975 [9 Oct 1974] 43707/74 Heading B1D A screen (e.g. for sewage) has parallel spaced apart bars 12 and a power operated rake 19 on a carriage reciprocable longitudinally (e.g. by chain) of the bars to remove solid matter therefrom wherein by means of a piston/cylinder motor mounted on the carriage, the tines 24 are movable between a working position in which they engage between the bars 12 and an inoperative position (Fig. 3) in which they are held clear of the bars. The tines 24 may be carried on one or two tine plates 22 tangentially mounted on rotatable cylinder(s) 21. The rake carriage 19 is counterbalanced and moved by motor 30. Screened solids are delivered onto carriage 16 by scraper 31. Reversal of carriage and actuation of piston/ cylinder motors is controlled by limit switches. Solids are raked upwardly and the tines disengage on the downward travel.
Patent GB-1008294-A (GB)
Title: Organosilicon compounds
Inventor: ANDERSON ROBERT CRAIG
IPC: C07F7/08
Filed: 1963-11-06
Abstract: The invention comprises phenoxy and bi-phenoxy siloxanes of the general formula <FORM:1008294/C3/1> where R is a monovalent organic group or hydrogen, Z is a phenoxy group, in which case a is 2, or an o,o1-biphenoxy group, in which case a is 1, X is oxygen or an -OYO- group wherein Y is -(R211SiO)n(R211Si)- where R11 is hydrocarbon and n is 0 or a positive integer and R1 is <FORM:1008294/C3/2> in which R111 is a monovalent hydrocarbon, or compounds wherein Z, R, R11 and R111 are substituted, n is preferably not greater than 200.  They may be prepared by (1) controlled hydrolysis of a silane or by cohydrolysis of a mixture of silanes, (2) the reaction of a silanol with a silane or siloxane containing a siliconbonded halogen atom in the presence of an acid acceptor, (3) the reaction of a chlorosilane with a hydroxysiloxane, (4) the reaction of a halosilane or a halosiloxane with an alkali metal silanolate.  R and R111 may be alkyl, haloalkyl, aryl, haloaryl, aminoaryl, alkenyl or hydrogen. The group Z may be substituted by halogen, alkoxy, polyalkyleneoxy, haloalkyl, haloaryl, nitro, amino and alkylamino groups. Typical examples describe the preparation of 1,3-dimethyl tetraphenoxy disiloxane; 1,1,3,3-bis -(o,o1 - biphenoxy) - 1,3 - dimethyldisiloxane; 1,1 - o,o1 - biphenoxy - 1 -phenyl -3,3,5,5,5-pentamethyl trisiloxane.  Uses.-As a diffusion pump fluid.
Patent GB-1534551-A (GB)
Title: Electrodes
IPC: H01J1/46
Filed: 1976-10-21
Abstract: 1534551 Pyrolytic carbon electrode ENGLISH ELECTRIC VALVE CO Ltd 18 Aug 1977 [21 Oct 1976] 43823/76 Heading C1A [Also in Division H1] An apertured electrode of pyrolytic carbon is formed in the shape of a hollow truncated cone having a uniform wall thickness over the apertured region 1. Preferably the taper is uniform at an angle down to 1 degree, the uniform wall thickness is achieved by grinding the outer surface while the cone is mounted on a close-fitting similarly shaped rotatable mandrel and the apertures 4 are formed through a mast using a shot abrasion process. The conical shape of the electrode and the mandrel permits easier manufacture than for conventional cylindrically-shaped electrodes.
Patent GB-1073169-A (GB)
Title: Automatic record player
IPC: G11B17/028
Filed: 1964-10-28
Abstract: 1,073,169. Automatic gramophone. MATSUSHITA ELECTRIC INDUSTRIAL CO. Ltd. Oct. 28, 1964 [Dec. 2, 1963; Dec. 10, 1963; Dec. 11, 1963 (2); Dec. 12. 1963; Dec. 26, 1963; Jan. 13, 1964], No. 44051/64. Heading G5R. Dropping a single record 24 over a centrepost 12 to turntable 2 rocks a " start '' lever 15 which shifts a lever 36 to the right to initiate an automatic playing cycle in which:- (a) The record diameter is sensed. (b) The pick-up is lifted, swung to a corresponding starting position and lowered on to the record. (c) The pick-up, at the end of playing, is returned to its rest and the machine switched off. On removing the record, the steeper profile 17 engages the record and the lever 15 is lifted such that when rocked by final removal of the record, the lowest part 19 of the lever 15 does not start another automatic cycle. A plain adapter (Fig. 8, not shown) allows single records with large holes to be played. An automatic adapter (Fig. 9, not shown) converts the machine to a consecutive-access auto-changer for large hole records, the dropping mechanism (not detailed) being actuated by cam 123 fixed to the cycling wheel 21 for the other automatic mechanism (Figs. 2, 4-7, not shown). The mechanism may be set for playing records, particularly non-standard diameter and film types, manually and the auto-stop means can be disengaged to repeat one record continuously.
Patent GB-1173637-A (GB)
Title: Silicon Carbide Manufacturing Plant.
Inventor: BOLKCOM WILBUR THOMAS
IPC: C01B31/36
Filed: 1967-09-27
Abstract: 1,173,637. Electric furnace plant. W. T. BOLKCOM and W. E. KNAPP. 27 Sept., 1967 [23 Feb., 1967], No. 44077/67. Heading F4B. An electric furnace plant for manufacturing silicon carbide comprises a number of furnaces, each mounted on a truck body 32, and having removable ends 33 carrying electrodes 38, and trackways 14a, b, 15a, b and 16a, b leading to transformer stations 11, 12, 13 where the electrodes of the furnace ends can be connected to water cooled clamps 51, a transfer track 17 on which a furnace truck 100 can be moved on a car 22 to a trackway 27 tranversing an unloading area, or to form a track way 29 traversing a loading area. Each furnace-has removable sides 40 having inwardly inclined lower parts, which are removed to allow hot silicon carbide to be pushed off the body of a truck on the unloading track 27. The side 40 and ends 33 of the truck are replaced and the furnace 100 transferred by car 22 to track 29 for loading by an overhead hopper or the like. The charged furnace is transferred by car 22 to a vacant transformer track, and the clamps 51 are connected to the electrodes 38. At the completion of the process, the furnace may remain on the -transformer track to cool until the unloading track 27 is vacant. The provision of charging and discharging tracks remote from a number of independent transformer stations enables mechanized handling equipment and the electric supply installation to the fully used.
Patent GB-1478107-A (GB)
Title: Method of manufacturing an endless printing belt for a  printing apparatus
IPC: B41N1/20
Filed: 1975-10-27
Abstract: 1478107 Relief printing plates KYUROKU KK 27 Oct 1975 44164/75 Heading G2M [Also in Division B3] An endless printing belt 4 for printing apparatus is produced from a strip of heat-treated steel, e.g. quenched martensitic stainless steel, which is provided by photo-etching one face with relief printing types 1, timing marks 2, and sprockets 3, is photoetched on its opposite face, and is joined at its ends by electron beam welding to form a belt. After an initial welding operation, the resulting weld is stress relieved by a second pass using a beam of lower energy density. Before the ends are joined, the ends and edges of the strip, which had previously been perforated with locating apertures, are trimmed from the strip.